/**
 * BibSonomy-Webapp - The web application for BibSonomy.
 *
 * Copyright (C) 2006 - 2016 Knowledge & Data Engineering Group,
 *                               University of Kassel, Germany
 *                               http://www.kde.cs.uni-kassel.de/
 *                           Data Mining and Information Retrieval Group,
 *                               University of Würzburg, Germany
 *                               http://www.is.informatik.uni-wuerzburg.de/en/dmir/
 *                           L3S Research Center,
 *                               Leibniz University Hannover, Germany
 *                               http://www.l3s.de/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.bibsonomy.webapp.validation;

import static org.bibsonomy.util.ValidationUtils.present;

import org.bibsonomy.webapp.command.actions.ImportCommand;
import org.bibsonomy.webapp.util.Validator;
import org.springframework.util.Assert;
import org.springframework.validation.Errors;

/**
 * @author mwa
 */
public class ImportValidator implements Validator<ImportCommand>{

	@Override
	public boolean supports(final Class<?> clazz) {
		return ImportCommand.class.equals(clazz);
	}

	@Override
	public void validate(Object target, Errors errors) {
		final ImportCommand command = (ImportCommand) target;
		
		Assert.notNull(command);
		
		Assert.notNull(command.getImportType());
		
		/* look into the for each importType required fields */
		if ("delicious".equals(command.getImportType())) {
			if (!present(command.getImportUsername())) {
				errors.rejectValue("importUsername", "error.field.required");
			}
			if (!present(command.getImportPassword())) {
				errors.rejectValue("importPassword", "error.field.required");
			}
		} else if ("browser".equals(command.getImportType())) {
			if (command.getFile() == null || command.getFile().getSize() == 0){
				errors.rejectValue("file", "error.field.required");
			}
		}
	}

}
